Carpenter&#39;s planes



Jan. 24, 1961 N. KULBERSH ET AL CARPENTER S PLANES Filed May 8, 1959 II I l llllll INVENTORS Hill] I l ATTORNEYS CARPENTERS PLANES Nathan Kulbersh, New Haven, and George J. Filia, Trumbull, Conn., assignors to Sargent & Company, New Haven, Conn., a corporation of Connecticut Filed May 8, 1959, Ser. No. 812,026

3 Claims. (Cl. 145-14) This invention relates to a carpenters plane, and more particularly to a plane of simple construction which may be economically made and which at the same time will be durable in use and give longer service than is ordinarily the case.

It is well known that the bit of a carpenters plane needs frequent reconditioning or sharpening in order to render proper service in use. To sharpen the bit it must be removed from the body of the plane and ground on its cutting edge. The cutting edge is normally provided at only one edge of the tool, the other edge projecting upwardly from the body of the plane.

In the present instance it is contemplated to provide a plane withwhich may be employed a bit which is of the same dimensions in length and width so as to be substantially square. Each of the four edges of the bit is sharpened and the body of the plane is so made that the bit may be turned so that any one of the four edges may be employed as a cutting edge. Thus less frequent sharpeningof the bit is required as, when one of the edges becomes dull, it is only necessary to turn the bit orblade through an angle or'so degrees in order to present another of the edges to thework, and this may be done until all four of the edges have been used.

In order to prevent any danger of the operato-rs hand coming in contact with one of the sharp edges of the bit, the clamping member which holds the bit in place may be so shaped as to form a guard overlying the upper edge of the bit so as to cover the same and prevent the hand of the operator coming in contact with it.

One object of the invention is to provide a carpenters plane of new and improved form which may be simple in construction, economically manufactured, and require less frequent sharpening than is usual.

A further object of the invention is to provide a carpenters plane so constructed that it may be employed with a bit of substantially square shape so that each of the four edges of the bit may be employed as a cutting edge and to provide means for securing the bit in place upon the body of the tool.

Still another object of the invention is to provide a plane having a substantially square bit sharpened upon each of its four edges and means for securing the bit in place so that any one of these edges may be employed as the cutting edge and at the same time provide means for adjusting the bit to vary the depth of cut.

A further object of the invention is to provide a carpenters plane of the character described wherein a guard is provided for the upper edge of the bit so that the hand of the operator will not come in contact therewith.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. l is a top plan view of a carpenters plane embodying our invention;

Fig. 2 is a partial sectional view on line 22 of Fig. 1;

cated at 25 (Fig. 2), so'that it "bears against the blade I port.

ice

' blade;

Fig. 4 is a plan view of the rear face of the clamping member;

Fig. 5 is a fragmentary top plan view of the plane body with the bit removed therefrom; and

Fig. 6 is a sectional view on line 6-6 of Fig. 5.

To illustrate one embodiment of the invention we have shown in the drawings a plane comprising a body 10 having handles 11 and 12 at the front and rear thereof. The body is provided with a lower plane surface 10 and spaced side flanges 13 and 14 between which the cutting blade or bit lies, as shown in Figs. 1 and 2.

Between these flanges a bridge 15 is provided, which bridge has an inclined forward face adapted to support the bit in an inclined position. The flanges 13 and 14, together with the bridge, form a well within which the blade or bit is mounted, the bit extending through the opening 10 in the body. This inclined face of the member 15 is recessed, as shown at 16, so that spaced inclined ribs 17 and 18 are provided upon each side of the recess upon which the bit lies. These ribs are undercut from their lower ends upwardly to leave raised portions 17* and 18 upon which the bit rests. At its lower end the bit rests upon the inclined rear surface 10 of the body opening 10. v

The bit is shown at 19 in Fig. 3 and, as illustrated, comprises a substantially square flat member having each of its edges sharpened, as shown at 20. The body of the bit is provided with a central opening 22 and also an opening 23 adjacent each sharpened edge thereof, there being four of these latter openings in all.

A clamping member 24 is provided for the bit, as shown more especially in Figs. 2 and 4. This member may be somewhat resilient and is bowed transversely, as indionly at its upper and lower ends. A clamp screw 26 is inserted through an opening 27 in the clamp member and this screw is passed through the opening 22 in the blade and threaded into the bridge member 15 so as to clamp the blade securely in place.

It will be noted that at its lower end the clamp member 24 is beveled, as shown at 28, so that only the lower edge of this member rests against the upper surface of the blade, to present a line edge to the chips instead of a blunted edge. At its upper edge the clamp member has a portion of arcuate shape above the bearing line on the blade, as indicated at 29, which, as shown in Fig. 2, extends over the upper sharpened edge of the blade or hit and forms a guard for the latter to prevent the users hand coming in contact therewith.

Means are provided for adjusting the blade in a vertical direction so as to vary the depth of cut. As illustrated, this means is in the form of an L-shaped strap member 30 which adjacent its lower edge is provided with a pin 31 for reception in one of the openings 23 of the blade. The shorter leg 32 of the adjusting strap is turned at right angles to the body portion thereof and in the portion 32 is rotatably mounted an adjusting screw 33 which is threadedly received in the bridge 15. Rotation of the screw moves the adjusting strap 30 along the recessed surface of the bridge 15 and draws with it the bit 19 so as to adjust the cutting edge with respect to the bottom surface 10 of the plane.

It may be noted that the depth of the recess 16 may be slightly greater than the thickness of the adjusting strap 30 so that the latter may lie in this recess and be adjusted therealong while the blade will be supported upon the raised portions 17 and 18 of the ribs 17 and 18 upon each side of the recess so that it will have a firm sup- By adjusting the screw 33 the blade may be set at any desired position. When it is desired to remove Patented Jan. 24, 1961,

the blade for any purpose, the screw 26 is taken out and the damp 24 released whereupon the blade may be lifted to the work, and this may be repeated until all four of the edges have been used. It Will be noted that the opening 22 is somewhat larger than the body of the" screw 26 so as to permit adjustment of the'blade lay the screw 33. a x

It will be seen that the plane is coiiip'e s ed of comparatively few parts and, therefore, ma'y beec'or'io'mically made. Atthe same time the blade or bit will give l'ong' serviceb'efore sharpening is necessary due to the fact' that all four' of the edges may be used, for, While the blade may be readily removed, it will be held securely in position during operation of the tool and the upper sharp edge of the blade will be guarded against injury to the user.

While we have shown and described one embodiment of our invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the claims.

What we claim is: a a

1. A carpenters plane comprising a body member having a lower plane surface and a bridge member on its upper side, said bridge member having an inclined forwardly facing surface with the longitudinal recess therein providing spaced ribs, one on either side of said recess, a bit resting on raised portions of said ribs' an adjusting strap disposed in said recess and connected to the bit,- an adjusting screw rotatably connected to the strap and threadedinto said bridge, said bit being sharpened upon its inner and lower edges, and a resilient clamping member seu red over said bit and having a part at its end extending over the upper edge of the bit to guard the latter.

2. A carpenters plane comprising a body member having a lower plane surface and a bridge member on its upper side, said bridge member having an inclined forwardly facing surface with the longitudinal recess therein providing spaced ribs, on'e on either side of said recess, a bit resting on raised' portions of said ribs, an adjusting strap disposed in said recess and connected to the hit, an adjusting screw rotatably connected to the strap and threaded into said bridge, said bit being sharpened upon its upper and lower edges, a resilient bowed clamping plate secured-over said: bit andhaving a part at its upper end eirtending over the upper edge of the bit to guard the latter, a headed screw passing through said plate and bit and threaded into said bridge member, and said clamping pla'te being beveled at its lower edge to make line contact with the surface of thebit.

3. A carpenters plane comprising a body member having a lower plane surface and a bridge member on its upper side, said bridge member having an inclined forwardly facing surface with a longitudinal recess therein providing spaced ribs, one on either side of said recess, a bit resting on raised portions of said ribs, an adjusting strap disposed in said recess and connected to the bit, said strap having a bent end portion lying rearwardly of said bridge member, an adjusting screwrotab ably connected to the bent end of the strap and threaded into said bridge member, a bowed resilient clampingmember, the edges of which rest on the surface of the bit, and a clamping screw passing through the clamping member and bit and threaded into said bridge member,

the connection between said adjusting strap andbit being above said clamping screw.

References Cited in the tile or this atent" UNITED: STATES PATENTS UNITED STATES PATENT OFFICE CERTIFICATION OF CORRECTION Patent No 2 969 O97 January 24, 1961 Nathan Kulbersh et aln It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 3 line 35 for "inner read we upper Signed and sealed this 13th day of June 1961, v

( EA L) Attest:

ERNEST W. SWIDER DAVID L. LADD Attesting Officer Commissioner of Patents 

